#!/usr/bin/env bash
# Generate partially prefilled release evidence markdown.
#
# Usage:
#   bash ops/generate_release_evidence.sh
#   bash ops/generate_release_evidence.sh --out release-evidence-custom.md
#   bash ops/generate_release_evidence.sh --sofiia-url http://127.0.0.1:8002 --skip-preflight
#
# Exit codes:
#   0 = file created
#   1 = critical error

set -euo pipefail

SOFIIA_URL="http://127.0.0.1:8002"
OUT_FILE=""
SKIP_PREFLIGHT=0
SKIP_HEALTH=0

while [ "$#" -gt 0 ]; do
  case "$1" in
    --out)
      OUT_FILE="${2:-}"
      shift 2
      ;;
    --sofiia-url)
      SOFIIA_URL="${2:-}"
      shift 2
      ;;
    --skip-preflight)
      SKIP_PREFLIGHT=1
      shift
      ;;
    --skip-health)
      SKIP_HEALTH=1
      shift
      ;;
    -h|--help)
      cat <<'EOF'
Usage: bash ops/generate_release_evidence.sh [options]

Options:
  --out <file>          Output markdown file path
  --sofiia-url <url>    Sofiia console base URL (default: http://127.0.0.1:8002)
  --skip-preflight      Skip preflight execution
  --skip-health         Skip health/metrics checks
EOF
      exit 0
      ;;
    *)
      echo "Unknown argument: $1"
      exit 1
      ;;
  esac
done

if ! command -v git >/dev/null 2>&1; then
  echo "ERROR: git is required"
  exit 1
fi
if ! command -v date >/dev/null 2>&1; then
  echo "ERROR: date is required"
  exit 1
fi

REPO_ROOT="$(git rev-parse --show-toplevel 2>/dev/null || true)"
if [ -z "${REPO_ROOT}" ]; then
  echo "ERROR: not inside a git repository"
  exit 1
fi

cd "${REPO_ROOT}"

TS_TAG="$(date -u '+%Y%m%d-%H%M%S')"
if [ -z "${OUT_FILE}" ]; then
  OUT_FILE="release-evidence-${TS_TAG}.md"
fi

UTC_TS="$(date -u '+%Y-%m-%d %H:%M:%S UTC')"
KYIV_TS="$(TZ=Europe/Kyiv date '+%Y-%m-%d %H:%M:%S %Z' 2>/dev/null || date '+%Y-%m-%d %H:%M:%S')"
GIT_SHA="$(git rev-parse --short HEAD 2>/dev/null || echo "unknown")"
GIT_BRANCH="$(git rev-parse --abbrev-ref HEAD 2>/dev/null || echo "unknown")"
GIT_MSG="$(git log -1 --pretty=%s 2>/dev/null || echo "unknown")"
HOST_NAME="$(hostname 2>/dev/null || echo "unknown")"
NODE_ID_VALUE="${NODE_ID:-unset}"
OPERATOR_VALUE="${USER:-unknown}"

PREFLIGHT_STATUS="SKIPPED"
PREFLIGHT_CMD='bash ops/preflight_sofiia_console.sh'
if [ "${SKIP_PREFLIGHT}" = "0" ]; then
  set +e
  bash ops/preflight_sofiia_console.sh >/dev/null 2>&1
  PREFLIGHT_CODE=$?
  set -e
  if [ "${PREFLIGHT_CODE}" = "0" ]; then
    PREFLIGHT_STATUS="PASS"
  elif [ "${PREFLIGHT_CODE}" = "2" ]; then
    PREFLIGHT_STATUS="WARN"
  else
    PREFLIGHT_STATUS="FAIL"
  fi
fi

HEALTH_CODE="SKIPPED"
METRICS_CODE="SKIPPED"
if [ "${SKIP_HEALTH}" = "0" ]; then
  set +e
  HEALTH_CODE="$(curl -s -o /dev/null -w '%{http_code}' --max-time 5 "${SOFIIA_URL}/api/health" 2>/dev/null || echo "000")"
  METRICS_CODE="$(curl -s -o /dev/null -w '%{http_code}' --max-time 5 "${SOFIIA_URL}/metrics" 2>/dev/null || echo "000")"
  set -e
fi

cat > "${OUT_FILE}" <<EOF
# Release Evidence: Sofiia Console

## 1) Release metadata

- Release ID: ${TS_TAG}
- Date/Time UTC: ${UTC_TS}
- Date/Time Europe/Kyiv: ${KYIV_TS}
- Operator: ${OPERATOR_VALUE}
- Hostname: ${HOST_NAME}
- NODE_ID (env): ${NODE_ID_VALUE}
- Target nodes: NODA1 / NODA2
- Deployed SHAs:
  - sofiia-console: ${GIT_SHA}
  - router:
  - gateway:
  - memory-service:
- Git branch: ${GIT_BRANCH}
- HEAD commit message: ${GIT_MSG}
- Change summary (1-3 bullets):
  - 

## 2) Preflight results

- Command: \`${PREFLIGHT_CMD}\`
- Status: ${PREFLIGHT_STATUS}
- WARN summary (if any):
  - 

## 3) Deploy steps performed

- NODA2 precheck: OK / FAIL
  - Notes:
- NODA1 rollout: OK / FAIL
  - Method (docker/systemd/manual):
  - Notes:
- NODA2 finalize: OK / FAIL
  - Notes:

## 4) Smoke evidence

- GET /api/health: HTTP ${HEALTH_CODE}
- GET /metrics: HTTP ${METRICS_CODE}
- Idempotency A/B smoke:
  - Command: \`bash ops/redis_idempotency_smoke.sh\`
  - Result: PASS / FAIL
  - message_id:
- /api/audit auth checks:
  - without key -> 401 confirmed: yes / no
  - with key -> 200 confirmed: yes / no

## 5) Post-release checks

- Key metrics deltas (optional):
  - sofiia_rate_limited_total:
  - sofiia_idempotency_replays_total:
- Audit write/read quick check: OK / FAIL
- Retention dry-run:
  - Command: \`python3 ops/prune_audit_db.py --dry-run\`
  - candidates=
  - Notes:

## 6) Rollback plan & outcome

- Rollback needed: no / yes
- If yes:
  - reason:
  - rollback commands used:
  - result:
- Final service state: healthy / degraded

## 7) Sign-off

- Reviewer / approver:
- Timestamp UTC:
- Notes:
EOF

echo "Release evidence file created: ${OUT_FILE}"
exit 0